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G0474/G0475 Sandblasters
13. Move the blast nozzle air supply lever to ON
or the open position (see Figure 13).
14. Move the sand metering valve lever to your
required sand flow volume requiremen
t (see
Figure 14).
Figure 13. Blast nozzle air supply valve, opened.
15. Point the blast nozzle at the workpiece and
slowly move the blast nozzle lever
(Figure
15) to the ON or open position. Sand blasting
will begin.
16. Move the blast nozzle in a slow circular
motion.
Note: A good starting point for tip distance is
four inches away from the workpiece. Start
out with a low air pressure setting to avoid
excess peening and abrasive wear.
Note:
Experiment with different pressures,
abrasives, sand flow, and tips to gain practical
experience.
Note: Keep the sandblasting abrasives
moisture-free; otherwise, the sand elbow and
the sand flow valve at the bottom of the tank
will clog frequently.
17. When sandblasting is complete, ALWAYS
close the air supply lever before you disconnect
the air supply line. Otherwise the residual air
in the tank will expel sand backwards through
the water separator and out of the air supply
fitting, damaging the water separator.
Figure 14. Sand metering valve in the full-open
position.
Figure 15. Blast nozzle valve, open.